Question

write in formula,inquestion no. 27 only answer in long formula not in short......

Answer 1

7x - 20 = y (vertically opposite angles are equal) ........1

3x + y = 180 (Linear pair angles add up to 180).................2

using 1 in 2,..........

3x + 7x -20  = 180

10x = 200

or x = 20

using x = 20 in equation 1...................

7 X 20 - 20 = y

or y = 120

therefore , x + y = 120 + 20 = 140

Answer 2

This is the right answer. You can ask anything from me in Maths which you can't understand.
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